Watson described the purpose of psychology as: âTo predict, given the stimulus, what reaction will take place; or, given the reaction, state what the situation or stimulus is that has caused the reactionâ (1930, p. 11). * All behavior is learnt from the environment.
Additional tests including penetration,solubility, and ductility are made on the residue. Cutback asphalt grades and tests There are several grades for each of the three types ofcutbacks â rapid curing (RC), medium curing (MC), andslow curing, (SC). The grades include 70, 250, 800, and3000.
4/12 to 12/12 Pitch: Asphalt and Composite. Asphalt shingles or composition shingles are the most popular kind of shingle and are the most serviceable type of shingle in terms of roof pitch. Asphalt shingles can start as low as 4/12 pitch, going all the way up to a 12/12 pitch.